Wednesday, May 26, 2010

Fermi LAT weekly report N. 102





Covered period: 2010.May.17 - 2010.May.23

LAT Mission week: 102.57 - 103.57





  • Blazar 1FGL J1033.8+6048 dimmed below 1E-6 with daily detection only untill 20th May.

  • Blazar 4C 21.35 (also known as PKS 1222+21) still bright, detected all week with a daily flux between (1.2+/-0.6)E-6 ph cm-2 s-1 and (2.3+/-0.4)E-6 ph cm-2 s-1, peaking on May 18th.

  • PKS 1424-41 detected most days this week, with increasing daily flux between 0.6 and 1E-6.

  • PKS 0537-441 detected most days this week, with daily flux between 0.6E-6 and 1.1E-6.

  • Blazar PKS 0426-380 detected on four days this week, with daily flux between 0.5 and 1.4E-6.

  • Blazar CGRaBS J1312+4828 detected on three consecutive days this week (May 18th - May 20th) with an average daily flux of about 0.35E-6 ph cm-2 s-1.

  • 3C 454.3 very bright all the week with daily flux above 3.5E-6.

  • Sporadic daily detections of blazars 3C 273, PKS 2155-304, PKS 0332-403, 4C +55.17, PKS 1510-089 and CGRaBS J1700+6830.

Fluxes are in the unit of photons/cm^2/s above 100 MeV.



Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.

For questions and comments please contact:

- F. D'Ammando (dammando[at]ifc.inaf.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Tuesday, May 25, 2010

Fermi LAT weekly report N. 101





Covered period: 2010.May.10 - 2010.May.16

LAT Mission week: 101.57 - 102.57





  • Blazars PKS 1424-41, 4C 21.35 (also known as PKS 1222+21), 3C 454.3 very bright (daily flux above 2E-6 during most of the week).

  • For the first time from the launch of Fermi, the LAT source 1FGL J1033.8+6048 (associated to two FSRQ sources, S4 1030+61, a.k.a. TXS 1030+611, z=1.4009, and GB6 J1032+6051, z=1.064) flared above the 1E-6threshold. ATel#2622 published. Follow up by ground-based telescopes and Swift confirm the identification with S4 1030+61 (related following ATels). Weekly averaged flux is about 0.5E-6.

  • PKS 0537-441 dimmed during the week.

  • PKS 0301-243 reached the daily flux threshold of 1E-6 on May 11. Weekly averaged flux is about 0.3E-6.

  • BL Lac relatively bright (in particular reached a daily flux around 0.7E-6 on May 11, and weekly averaged flux about 0.26E-6), as well as Mkn 421 (weekly averaged flux about 0.1E-6).

  • Sporadic daily detections of blazars OP 313, 3C 273, PKS 0426-380, and PKS 2155-304.

  • Other blazars detected on weekly timescale, among others, are 3C 66A, NGC 1275, PMN J0850-1213, PKS 2227-08, B2 1520+31, PKS 0332-403.


Fluxes are in the unit of photons/cm^2/s above 100 MeV.



Note. All the flux reported above are by the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification. - Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- S. Ciprini (stefano.ciprini[at]pg.infn.it) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Tuesday, May 11, 2010

Fermi LAT weekly report N. 100



Covered period: 2010.May.3 - 2010.May.9

LAT Mission week: 100.57 - 101.57




  • 4C+21.35 still active, detected all week with an average daily flux of 2.1x10^-6 ph cm-2 s-1, rising towards the end of the week peaking on the 8th May at a flux of (3.2+/-0.4)x10^-6 p cm-2 s-1.
  • 3C454.3 was very bright, detected every day this week, peaking on the 7th May at a flux of (8.9+/-0.8)x10^-6 ph cm-2 s-1.
  • PKS 0537-441 continued its activity from last week with an average daily flux of 0.7x10^-6 ph cm-2 s-1. It was detected every day this week.
  • PKS 0301-243 continued its activity from last week and was detected up until 6th May with an average daily flux = 0.5x10^-6 ph cm-2 s-1.
  • PKS 0426-380 detected for four days this week, 6th-9th May, an average daily flux of ~0.5x10^-6 ph cm-2 s-1.
  • PKS 1424-41 detected for five days this week, 5th-9th May, with an average daily flux of ~1.3x10^-6 ph cm-2 s-1.
  • CRABS J1033+6051 was detected in the middle of the week, 4th-7th May, with an average daily flux of ~0.5x10^-6 ph cm-2 s-1.

Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.

Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- A. B. Hill (adam.hill@obs.ujf-grenoble.fr) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Wednesday, May 5, 2010

Fermi LAT weekly report N. 99



Covered period: 2010.Apr.26 - 2010.May.2

LAT Mission week: 99.57 - 100.57





  • 4C+21.35 still very bright, detected all week with an average daily flux of 4.3x10^-6 ph cm-2 s-1, peaking on the 30th April at a flux of (13.1+/-0.7)x10^-6 ph cm-2 s-1.

  • 3C454.3 remained bright, detected every day this week, fluctuating in daily flux between (2.9+/-0.5)x10^-6 ph cm-2 s-1 and (5.7+/-0.6)x10^-6 ph cm-2 s-1.

  • PKS 0537-441 (27th April, daily flux = (1.2+/-0.2)x10^-6 ph cm-2 s-1) and PKS 0301-243 (28th April, daily flux = (1.4+/-0.3) x10^-6 ph cm-2 s-1) exhibited an increase in gamma- ray activity , (see ATel#2591). Both sources detected throughout week.

  • PKS 0426-380 detected on most days this week, at a relatively steady daily flux of ~0.6x10^-6 ph cm-2 s-1.


  • Mrk421 detected on four days this week with an average daily flux of ~0.3x10^-6 ph cm-2 s-1.

  • Sporacid activity from CGRaBS J0850-1213, CGRaBS J1033+6051, PKS 0727-11, PKS 1510-08, PKS 1424-41 and B2 0954+25A







Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- A. Cannon (annacannon1984@gmail.com) for generic information related to this week

- Contact persons on this page for individual sources cited above.




Monday, May 3, 2010

Fermi LAT weekly report N. 98



Covered period: 2010.Apr.19 - 2010.Apr.25

LAT Mission week: 98.57 - 99.57





  • PKS 0426-380 detected on 5 days this week with a daily flux above 0.5 +/- 0.2 X 10-6 (peak on Apr 22, with a daily flux (0.9 +/- 0.3) X 10-6).

  • PKS 0537-441 detected all week long with daily flux approaching and around (1 +/- 0.2) X 10-6.

  • S5 0716+714 detected on Apr. 19 and 22 with daily fluxes around (0.5 +/- 0.2) X 10-6.

  • CGRaBS J0850-1213 was detected on Apr. 19, 24, and 25 with daily fluxes not exceeding (0.8 +/- 0.2) X 10-6.

  • 4C +21.35 has been detected all week long in a high state with daily fluxes above (1.5 +/- 0.2) X 10-6. A peak in intensity has been observed on Apr. 24, when the daily flux was (8.1 +/- 0.7) X 10-6 (see ATel#2584).

  • PKS 1424-41 has reached daily fluxes around (1.0 +/- 0.2) X 10-6 on Apr. 21 and 22 (see ATel#2583).

  • PKS 2233-148 was detected on Apr. 19 and 23 with daily fluxes around (0.7 +/- 0.3) X 10-6.

  • 3C 454.3 still bright through the week but with daily flux fading from (9.5 +/- 0.8) X 10-6 to (3.4 +/- 0.5) X 10-6.

  • PKS 0906+01, HB89 1738+499, PKS 0301-243, PKS 0805-07, MRk 421, CGRaBS J1033+6051, and CGRaBS J1739+4955 were detected in one day of the week (flux below 1 X 10-6 ).



Fluxes are in the unit of photons/cm2/s above 100 MeV. All errors are statistical only.



Note. All the fluxes reported above are from the ASP analysis and should be considered preliminary and should not be used for publication, however they are indicative of the flux range and the current status of a source. Source association is done on the basis of source location, considering spatial coincidence only, and it is not indicative of an identification.
- Please acknowledge the LAT team if you use information from this report.


For questions and comments please contact:

- D. Donato (donato[at]milkyway.gsfc.nasa.gov) for generic information related to this week

- Contact persons on this page for individual sources cited above.